| 摘要 |
<p>The present invention relates to a waterproof sheet placed for the purpose of waterproofing during a tunnel construction. The waterproof sheet of the present invention has the simplest possible structure and is used during a tunnel construction so as to smoothly discharge water drained from the excavation face of the tunnel. The waterproof sheet comprises: a first waterproof sheet formed of a soft PE material that does not allow water to permeate; at least one fixed blade one end of which is fused onto the upper surface of the first waterproof sheet in the forward and backward directions; and a convex-concave part having multiple projections that are continuously and repeatedly projected in the forward and backward directions and the left and right directions on the upper surface of the first waterproof sheet on which the fixed blade is fused, such that constant spacing is maintained between the shotcrete face of the tunnel and the first water proof sheet, and the water drained from the excavation face of the tunnel can be discharged.</p> |
